body {
    font-family: monospace;
}

table.numbers {
    border-collapse:collapse;
}

table.numbers tr:nth-child(odd) {
    background-color:#F6F4F0;
}

table.numbers tr:nth-child(even) {
    background-color:#ffffff;
}

table.numbers th {
	color:   #ffffff;
    background-color: #555555;
    border:  1px solid #555555;
    padding: 3px;
    vertical-align: top;
    text-align: left;
}

table.numbers td {
	border:  1px solid #d4d4d4;
    padding: 5px;
    padding-top: 7px;
    padding-bottom: 7px;
    vertical-align: top;
}

div.output {
    display: inline-block;
}

#end {
    margin-top: 15px;
    font-size: 150%;
    text-align: center;
}